【摘要】 重点介绍了系统参数辨识中辅助变量法的基本原理,并通过某导弹天线伺服机构数学模型的辨识实例,具体说明了基于辅助变量法的参数辨识在M atlab中的实现方法。结果表明基于辅助变量法的参数辨识比最小二乘法具有更高的精度,尤其当噪声为有色噪声和噪声模型结构不好确定时,辅助变量法更加有效。更多还原

【Abstract】 The fundamental principle of instrumental variable(IV) was introduced,and a modeling example of guided missile’s servo system was given to show how to implement system identification based on instrumental variable method in Matlab.The results of modeling indicate that system identification with instrumental variable method is more accurate and effective than with least square method,especially in the case of color noise and uncertain noise’s structure.更多还原